You asked the question. That means you have the answer. We can not ask questions that cannot be answered. Because those questions have no answer. Hence they are not questions. That means the only real questions are the ones only you can answer.
Ask me a question that is unanswerable
What is life?
Up to you, youre not done with it
Why is everything how it is?
Because that is how you see it
How did everything start?
From one thing
How did that one start?
It loved itself enough to see its parts as a whole, that created a universe inside itself that you are in now, seeing everything in yourself will create a universe you will want to explore yourself, ultimately discovering that you are everything, and somehow you always were and always will
definition of universe: all existing matter and space considered as a whole; the cosmos
Fully understanding birth would mean that we could make it from one person, one person could create birth. But birth comes from love, love with another creates another, it does not fulfill either self, and it does not understand birth, it simply creates another with a chance for love and birth, but there is only one self and it is you, you will be able to understand birth when you understand all that is in yourself, love of the self is the birth of a universe
The answer is a part in the question, simply to be discovered within yourself